Question

Fill in the blank with an appropriate modal:

If only they ____ keep quiet for a moment.

• A. can
• B. will
• C. shall
• D. would

Answer 1

The correct option is D would

Option D is the correct answer because we often use 'would' in the main clause of a conditional sentence when we talk about imagined situations, as in this case, the condition here is keeping quiet.

Option B and C are incorrect because 'will' and 'shall' are used for the future tense.

Option A is incorrect because can is used to express ability which does not make sense in this case because keeping silence is definitely possible.